#1
Which of the following is a common cause of baseline artifact in an EKG?
Muscle movement
ExplanationMuscle movement can cause baseline artifact by interfering with the signal.
#2
Which EKG lead placement is most commonly used for monitoring in routine clinical practice?
Lead II
ExplanationLead II is commonly used for monitoring in routine clinical practice.
#3
What is the primary purpose of the P wave in an EKG recording?
Represents atrial depolarization
ExplanationThe P wave represents atrial depolarization in an EKG recording.
#4
What does the ST segment represent in an EKG?
Ventricular repolarization
ExplanationThe ST segment represents ventricular repolarization in an EKG.
#5
Which EKG lead placement is commonly used for detecting anterior myocardial infarctions?
Lead I
ExplanationLead I is commonly used for detecting anterior myocardial infarctions.
#6
What is the recommended paper speed for standard EKG recordings?
50 mm/s
ExplanationStandard EKG recordings are recommended to be done at a paper speed of 50 mm/s.
#7
How can motion artifact be minimized during an EKG recording?
Ensuring proper skin preparation
ExplanationProper skin preparation helps minimize motion artifact during EKG recordings.
#8
What is the purpose of using an EKG filter?
To remove artifacts
ExplanationEKG filters are used to remove artifacts from the signal.
#9
How does hyperventilation affect the appearance of an EKG recording?
It induces arrhythmias
ExplanationHyperventilation can induce arrhythmias, altering the EKG recording.
#10
Which electrolyte imbalance is commonly associated with a prolonged QT interval on an EKG?
Hypokalemia
ExplanationHypokalemia is commonly associated with a prolonged QT interval on an EKG.
#11
What effect does a right bundle branch block (RBBB) have on the QRS complex in lead V1?
Widened and negative deflection
ExplanationIn RBBB, the QRS complex in lead V1 is widened and shows a negative deflection.
#12
Which of the following is a potential source of AC interference in EKG signals?
Fluorescent lighting
ExplanationFluorescent lighting is a common source of AC interference in EKG signals.
#13
What precaution should be taken when using a defibrillator in close proximity to an EKG machine?
Pause EKG recording during defibrillation
ExplanationEKG recording should be paused during defibrillation to avoid interference.
#14
What is the significance of the PR interval on an EKG?
It indicates the duration of atrioventricular conduction
ExplanationThe PR interval indicates the duration of atrioventricular conduction.
#15
In which lead would you typically observe the QRS complex with a predominantly negative deflection?
Lead aVR
ExplanationLead aVR typically shows the QRS complex with a predominantly negative deflection.
#16
What is the significance of a peaked T wave on an EKG?
Suggests hyperkalemia
ExplanationA peaked T wave on an EKG suggests hyperkalemia.
#17
Which lead is commonly used for detecting an inferior myocardial infarction?
Lead III
ExplanationLead III is commonly used for detecting an inferior myocardial infarction.